20066554 has 4 divisors (see below), whose sum is σ = 30099834. Its totient is φ = 10033276.

The previous prime is 20066539. The next prime is 20066561. The reversal of 20066554 is 45566002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15327225 + 4739329 = 3915^2 + 2177^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5016637 + ... + 5016640.

Almost surely, 2^20066554 is an apocalyptic number.

20066554 is a deficient number, since it is larger than the sum of its proper divisors (10033280).

20066554 is a wasteful number, since it uses less digits than its factorization.

20066554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10033279.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 20066554 is about 4479.5707383632. The cubic root of 20066554 is about 271.7425205441.

The spelling of 20066554 in words is "twenty million, sixty-six thousand, five hundred fifty-four".